[InlineData("RC0064215_InvalidID")] // Invalid customer ID
public void GetAmount_Positive(string customerID)
{
//Arrange
mockCrmPaymentDetails.Setup(x => x.GetAmount(It.IsAny <string>())).Returns(paymentData.MockedReponseBodyForCRM_GetAmount());
//Act
paymentDetails.GetAmount(customerID);
//Assert
mockCrmPaymentDetails.VerifyAll();
}